Checkpoint Systems, Inc.

Fichtel & Sachs Industries, Inc.

Other

Lee T Lamond

Richard D Staton

James B Eldon, Iii

Eric J Armstrong

Peter L Gill

Ronald Kenney

William H Adams

Electronic article surveillance antenna structure

Electronic article surveillance sensing screen for a theft detection

A resonant circuit which forms part of a security tag for use in an electronic security system includes a fusible link which opens the circuit in response to radio frequency at the resonant frequency. The fusible link opens at a lower signal intensity than otherwise, because the substances of which it is made include at least one accelerator that promotes the fuse action.

Deactivatable security tag

A support column unit for an adjustable-height chair and the like comprises upper and lower telescoping tubular members, a piston-and-cylinder type pneumatic spring located coaxially within the tubular members and having its cylinder member secured to the lower tubular member, and a gravity dependent locking mechanism for locking the piston rod member of the pneumatic spring to the upper tubular member when the support column is upright and for releasing the piston rod member when the support column is inverted. The locking mechanism comprises a lock body retained within the upper tubular member and having a bore sized and positioned to permit sliding axial movement of the piston rod member therein. The lock body has one or more cavities, each one in communication with the bore and containing a locking member. The cavities and the locking members are sized and shaped such that when the support column is upright, each locking member falls to a position in which a portion thereof protrudes into the bore, and when the column is inverted, each locking member falls to a position in which it is fully retractd from the bore. The piston rod member has an annular retaining groove shaped to engage the portions of the locking members that protrude into the bore to achieve locking of the piston rod member to the lock body when the column is upright.

Support column with gravity retention means

A support column unit for an adjustable-height chair and the like comprises upper and lower telescoping tubular members, a piston-and-cylinder type pneumatic spring located coaxially within the tubular members and having its cylinder member secured to the lower tubular member, and a gravity dependent locking mechanism for locking the piston rod member of the pneumatic spring to the upper tubular member when the support column is upright and for releasing the piston rod member when the support column is inverted. The locking mechanism comprises a lock body retained within the upper tubular member and having a bore sized and positioned to permit sliding axial movement of the piston rod member therein. The lock body has one or more cavities, each one in communication with the bore and containing a locking member. The cavities and the locking members are sized and shaped such that when the support column is upright, each locking member falls to a position in which a portion thereof protrudes into the bore, and when the column is inverted, each locking member falls to a position in which it is fully retracted from the bore. The piston rod member has an annular retaining groove shaped to engage the portions of the locking members that protrude into the bore to achieve locking of the piston rod member to the lock body when the column is upright.

Support column with gravity dependent retention means

A plumbing trap is described for use with drain pipes from sinks or other fixtures that fits pipe of different diameters, which drain pipes need not be in perfect alignment, and may be of a different diameter at the entrance than at the exit of the trap. The trap can be easily attached and detached, is molded of a flexible plastic which provides a soft structure that can be manually manipulated to discharge obstructions therefrom without removal from the drain pipes, and is impervious to most chemicals.

Flexible plumbing trap

Growing community of inventors

North Wales, PA, United States of America

Lee T Lamond